P4KE9.1CA-B Circuit Protection

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TVS diodes, which stands for Transient Voltage Suppressors, are designed for use in electronic equipment to protect them from high surge voltage. The P4KE9.1CA-B series of TVS diodes from Littelfuse offers industry-leading protection against transient surges and overvoltages. This device features reverse voltage protection of up to 7.5kV, and an ESD protection level of 25kV.

The P4KE9.1CA-B TVS diode is designed for applications with higher reverse voltage ratings, such as power over Ethernet (POE), high voltage motor control, lightning protection, and solar energy applications. These applications may require a high level of protection from power surges and overvoltages, and the P4KE9.1CA-B offers the best possible protection.

The P4KE9.1CA-B features an ultra-low capacitance design making it perfect for high-speed data and signal line protection. Its low capacitance helps protect sensitive low-voltage signals from EMI/RFI interference. In addition, its low clamping voltage helps limit stress levels on the circuit. The P4KE9.1CA-B also has a high surge rating, making it suitable for protecting against lightning strikes.

The working principle of the P4KE9.1CA-B TVS diode is based on the well-known Zener diode principle. When the breakdown voltage of the diode is exceeded, the current flows through it, rather than through the protected circuit. The device uses a varistor, or voltage-dependent resistor, which is a special type of semiconductor that rapidly changes its resistance when subjected to changes in voltage. When the voltage increases, the resistance of the varistor decreases and allows more current to flow. This provides protection against transient surges and overvoltages.

The P4KE9.1CA-B TVS diode provides superior protection against transient surge voltages and ESD. It is suitable for a wide range of applications, as it offers high reverse voltage protection, an ultra-low capacitance, and a high surge rating. Thus, the P4KE9.1CA-B can be used in a variety of applications to ensure the safety and reliability of your electrical system.

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